skip to main content

Title: Fast electron propagation in Ti foils irradiated with sub-picosecond laser pulses at Iλ{sup 2}>10{sup 18} Wcm{sup −2}μm{sup 2}

We have studied the propagation of fast electrons through laser irradiated Ti foils by monitoring the emission of hard X-rays and K-α radiation from bare foils and foils backed by a thick epoxy layer. Key observations include strong refluxing of electrons and divergence of the electron beam in the foil with evidence of magnetic field collimation. Our diagnostics have allowed us to estimate the fast electron temperature and fraction of laser energy converted to fast electrons. We have observed clear differences between the fast electron temperatures observed with bare and epoxy backed targets which may be due to the effects of refluxing.
Authors:
; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN (United Kingdom)
  2. Central Laser Facility, Rutherford-Appleton Laboratory, Chilton Didcot, OX11 OQX (United Kingdom)
  3. Sandia National Laboratory, Albuquerque, New Mexico 87123 (United States)
Publication Date:
OSTI Identifier:
22252048
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON BEAMS; ELECTRON TEMPERATURE; ELECTRONS; EMISSION; EPOXIDES; FOILS; HARD X RADIATION; IRRADIATION; LASERS; LAYERS; MAGNETIC FIELDS; MONITORING; PULSES